Adhesive sheet for light-emitting diode device and light-emitting diode device

Abstract

[Problem] To provide an adhesive sheet which is used for a light-emitting diode device, and which is free from cracks and peeling off of the adhered portions. [Means for Solving the Problem] An adhesive sheet for a light-emitting diode device, which comprises a thermoplastic polymer containing epoxy groups and a compound containing functional groups which are addition reactive with the epoxy groups or a polymerization catalyst which can effect a ring opening polymerization of the epoxy groups, and in which said thermoplastic polymer is cross-linked so that its flowability is restrained.

1. A light-emitting diode device comprising a light-emitting diode element, a circuit board, a fluorescent material-containing resin, a lens and a fluorescent material-containing resin sealing frame, wherein said circuit board is adhered to the sealing frame by an adhesive sheet comprising
 the reaction product of a mixture of a thermoplastic polymer containing epoxy groups, 
 a thermoplastic polymer which contains no epoxy group, and 
 a compound containing functional groups which are addition reactive with epoxy groups, 
 wherein said mixture is cross-linked by an irradiation of an electron ray so that its flowability is restrained, 
 
       wherein the thermoplastic polymer which contains no epoxy groups comprises a thermoplastic polymer obtained by copolymerization of at least two different vinyl-group containing monomers, wherein the vinyl-group containing monomers do not contain epoxy groups. 
     
     
       2. The light-emitting diode device of  claim 1 , wherein said thermoplastic polymer containing epoxy groups is a polyolefinic copolymer containing epoxy groups. 
     
     
       3. The light-emitting diode device of  claim 1 , wherein said thermoplastic polymer containing epoxy groups is obtained by copolymerizing a vinyl group-containing monomer with an epoxy groups-containing monomer which is copolymerizable with said vinyl group-containing monomer.